content: /* ===========================================================
   * JFreeChart : a free chart library for the Java(tm) platform
   * ===========================================================
   *
   * (C) Copyright 2000-2012, by Object Refinery Limited and Contributors.
   *
   * Project Info:  http://www.jfree.org/jfreechart/index.html
   *
   * This library is free software; you can redistribute it and/or modify it
   * under the terms of the GNU Lesser General Public License as published by
   * the Free Software Foundation; either version 2.1 of the License, or
   * (at your option) any later version.
   *
   * This library is distributed in the hope that it will be useful, but
   * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
   * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
   * License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
   * USA.
   *
   * [Oracle and Java are registered trademarks of Oracle and/or its affiliates.
   * Other names may be trademarks of their respective owners.]
   *
   * ----------------------
   * ItemLabelPosition.java
   * ----------------------
   * (C) Copyright 2003-2012, by Object Refinery Limited and Contributors.
   *
   * Original Author:  David Gilbert (for Object Refinery Limited);
   * Contributor(s):   -;
   *
   * Changes
   * -------
   * 27-Oct-2003 : Version 1 (DG);
   * 19-Feb-2004 : Moved to org.jfree.chart.labels, updated Javadocs and argument
   *               checking (DG);
   * 26-Feb-2004 : Added new constructor (DG);
   * 17-Jun-2012 : Removed JCommon dependencies (DG);
   *
   */
  
  package org.jfree.chart.labels;
  
  import java.io.Serializable;
  
  import org.jfree.chart.ui.TextAnchor;
  
  /**
   * The attributes that control the position of the label for each data item on
   * a chart.  Instances of this class are immutable.
   */
  public class ItemLabelPosition implements Serializable {
  
      /** For serialization. */
      private static final long serialVersionUID = 5845390630157034499L;
  
      /** The item label anchor point. */
      private ItemLabelAnchor itemLabelAnchor;
  
      /** The text anchor. */
      private TextAnchor textAnchor;
  
      /** The rotation anchor. */
      private TextAnchor rotationAnchor;
  
      /** The rotation angle. */
      private double angle;
  
      /**
       * Creates a new position record with default settings.
       */
      public ItemLabelPosition() {
          this(ItemLabelAnchor.OUTSIDE12, TextAnchor.BOTTOM_CENTER,
                  TextAnchor.CENTER, 0.0);
      }
  
      /**
       * Creates a new position record (with zero rotation).
       *
       * @param itemLabelAnchor  the item label anchor (<code>null</code> not
       *                         permitted).
       * @param textAnchor  the text anchor (<code>null</code> not permitted).
       */
      public ItemLabelPosition(ItemLabelAnchor itemLabelAnchor,
                               TextAnchor textAnchor) {
          this(itemLabelAnchor, textAnchor, TextAnchor.CENTER, 0.0);
      }
  
      /**
       * Creates a new position record.  The item label anchor is a point
       * relative to the data item (dot, bar or other visual item) on a chart.
       * The item label is aligned by aligning the text anchor with the
       * item label anchor.
       *
       * @param itemLabelAnchor  the item label anchor (<code>null</code> not
       *                         permitted).
       * @param textAnchor  the text anchor (<code>null</code> not permitted).
       * @param rotationAnchor  the rotation anchor (<code>null</code> not
       *                        permitted).
       * @param angle  the rotation angle (in radians).
       */
      public ItemLabelPosition(ItemLabelAnchor itemLabelAnchor,
                               TextAnchor textAnchor,
                               TextAnchor rotationAnchor,
                               double angle) {
  
          if (itemLabelAnchor == null) {
              throw new IllegalArgumentException(
                      "Null 'itemLabelAnchor' argument.");
          }
          if (textAnchor == null) {
              throw new IllegalArgumentException("Null 'textAnchor' argument.");
          }
          if (rotationAnchor == null) {
              throw new IllegalArgumentException(
                      "Null 'rotationAnchor' argument.");
          }
  
          this.itemLabelAnchor = itemLabelAnchor;
          this.textAnchor = textAnchor;
          this.rotationAnchor = rotationAnchor;
          this.angle = angle;
  
      }
  
      /**
       * Returns the item label anchor.
       *
       * @return The item label anchor (never <code>null</code>).
       */
      public ItemLabelAnchor getItemLabelAnchor() {
          return this.itemLabelAnchor;
      }
  
      /**
       * Returns the text anchor.
       *
       * @return The text anchor (never <code>null</code>).
       */
      public TextAnchor getTextAnchor() {
          return this.textAnchor;
      }
  
      /**
       * Returns the rotation anchor point.
       *
       * @return The rotation anchor point (never <code>null</code>).
       */
      public TextAnchor getRotationAnchor() {
          return this.rotationAnchor;
      }
  
      /**
       * Returns the angle of rotation for the label.
       *
       * @return The angle (in radians).
       */
      public double getAngle() {
          return this.angle;
      }
  
      /**
       * Tests this object for equality with an arbitrary object.
       *
       * @param obj  the object (<code>null</code> permitted).
       *
       * @return A boolean.
       */
      @Override
      public boolean equals(Object obj) {
          if (obj == this) {
              return true;
          }
          if (!(obj instanceof ItemLabelPosition)) {
              return false;
          }
          ItemLabelPosition that = (ItemLabelPosition) obj;
          if (!this.itemLabelAnchor.equals(that.itemLabelAnchor)) {
              return false;
          }
          if (!this.textAnchor.equals(that.textAnchor)) {
              return false;
          }
          if (!this.rotationAnchor.equals(that.rotationAnchor)) {
              return false;
          }
          if (this.angle != that.angle) {
              return false;
          }
          return true;
      }
  
  }
  